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Extinct order of arthropods
Agnostida are an order of extinct arthropods which have classically been seen as a group of highly modified trilobites, though some recent research has
Agnostida
Class of extinct, Paleozoic arthropods
a common evolutionary trend. Notable examples of this were the orders Agnostida and Asaphida, and the suborder Illaenina of the Corynexochida. Effacement
Trilobite
Extinct genus of trilobites
two thorax segments outside most members of the Agnostida order. It can be distinguished from Agnostida by the very wide subquadrate glabella (about half
Thoracocare
Phylum of invertebrates with jointed exoskeletons
Caryosyntrips † (possible radiodont) Deuteropoda Artiopoda † Trilobita † Agnostida (possibly trilobites) † Nektaspida † Aglaspidida † Cheloniellida † Bushizheia
Arthropod
Suborder of agnostid trilobites
The Eodiscina are mostly considered the more primitive suborder of the Agnostida, and the Agnostina the more advanced. Some scholars do not consider the
Eodiscina
Second period of the Paleozoic Era
affected conodonts and planktonic forms like graptolites. The trilobites Agnostida and Ptychopariida completely died out, and the Asaphida were much reduced
Ordovician
Third and final epoch of the Ordovician Period, 458–444 million years ago
planktonic forms like conodonts, graptolites, and some groups of trilobites (Agnostida and Pytchopariida, which completely died out, and the Asaphida which were
Late_Ordovician
Extinct family of trilobites
classified under the superfamily Agnostoidea of the suborder Agnostina, order Agnostida. The family was first established by the Japanese paleontologist Teiichi
Ptychagnostidae
Family of trilobites
towards ancestral characters or an example of parallel evolution. Like all Agnostida, members of the Condylopygidae are relatively small and isopygous with
Condylopygidae
Member of the Langston Formation in Idaho and Utah, United States
The Spence Shale is the middle member of the Langston Formation in southeastern Idaho and northeastern Utah. It is exposed in the Bear River Range, the
Spence_Shale
Group of extinct arthropods
restoration of Tegopelte (Conciliterga) Life restoration of Pleuroctenium (Agnostida) The Artiopoda have been considered by many studies to consist of two
Artiopoda
Trilobite genus
Acmarhachis is a genus of trilobites in the order Agnostida, which lived in what are now Australia (Queensland, Tasmania), Canada (British Columbia, Newfoundland
Acmarhachis
Superfamily of trilobites
B. et al. Part O, Treatise on Invertebrate Paleontology. Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order Redlichiida. 1997 v t e
Judomioidea
Extinct species of trilobite
Robison (1984). "Cambrian trilobites of east-central Alaska". Cambrian Agnostida of North America and Greenland: Part I: Ptychagnostidae. The University
Lejopyge_laevigata
Extinct order of trilobites
than Laurentia. Whittington, H.B.; et al. (1997). Introduction, Order Agnostida, Order Redlichiida. Treatise on Invertebrate Paleontology. Vol. Part O
Redlichiida
Compound eye type found on triobites
Part O, Arthropoda 1, Trilobita, revised. Volume 1: Introduction, Order Agnostida, Order Redlichiida, Boulder, CO & Lawrence, KS: The Geological Society
Holochroal_eye
Species of trilobite
v t e Trilobites Taxonomy Orders Agnostida Asaphida Corynexochida Harpetida Lichida Nektaspida Odontopleurida Phacopida Proetida Ptychopariida Redlichiida
Phacops_fecundus
Extinct genus of trilobites
(1997). Part O, Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order Redlichiida. Treatise on Invertebrate Paleontology. Fatka, O.;
Paradoxides
Family of trilobites
Calodiscinae Kobayashi, 1943] are a family of trilobites belonging to the order Agnostida that lived during the Lower Cambrian (Botomian and Toyonian). They are
Calodiscidae
Extinct species of trilobite
both the cephalon and the pygidium. Like all members of the suborder Agnostida, Glyptagnostus reticulatus is completely blind and only has two thoracic
Glyptagnostus_reticulatus
Genus of trilobites
(1997). Part O, Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order Redlichiida. Treatise on Invertebrate Paleontology. pp. 477–478
Schagonaria
Genus of trilobites
(1997). Part O, Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order Redlichiida. Treatise on Invertebrate Paleontology. pp. 475–477
Anabaraspis
Genus of Devonian trilobites
Part O, Arthropoda 1, Trilobita, revised. Volume 1: Introduction, Order Agnostida, Order Redlichiida. Boulder, Colorado & Lawrence, Kansas: The Geological
Walliserops
Extinct genus of trilobites
Animalia Phylum: Arthropoda Clade: †Artiopoda Class: †Trilobita (?) Order: †Agnostida Family: †Diplagnostidae Genus: †Han Turvey, 2005 Species: †H. solo Binomial
Han_(trilobite)
American geologist (1927–2022)
Paleontology. Part O, Revised. Arthropoda 1: Trilobita: Introduction, Order Agnostida & Order Redlichiida, xxiv + 530 p., 309 fig., 1997. ISBN 0-8137-3115-1
Allison_R._Palmer
trinucleids, was blind. Homagnostus is a genus of trilobite in the order Agnostida, which existed in what is now north Wales. It was described by Howell
Palaeontology_in_Wales
Extinct genus of trilobites
Paleontology. Part O, Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order Redlichiida. Paleobiology Database Schoenemann, B.; Clarkson, E
Pricyclopyge
Mass extinction event c. 444 million years ago
species and groups with fully planktonic larvae or adults. The order Agnostida was completely wiped out, and the formerly diverse Asaphida survived with
Late Ordovician mass extinction
Late_Ordovician_mass_extinction
Hebediscidae is a family of trilobites belonging to the order Agnostida that lived during the Lower Cambrian (Atdabanian to Toyonian). They are small
Hebediscidae
Extinct genus of trilobites
Kingdom: Animalia Phylum: Arthropoda Clade: †Artiopoda Class: †Trilobita (?) Order: †Agnostida Family: †Peronopsidae Genus: †Quadragnostus Howell, 1966
Quadragnostus
Extinct family of trilobites
pelagic or deep water benthic life styles (such as species in Olenidae and Agnostida) died out. Also those trilobites having planktonic larvae became extinct
Cyclopygidae
Extinct genus of trilobites
among others been found in Colombia (Guaviare River, Meta). Like all Agnostida, Geragnostus is diminutive, with the headshield (or cephalon) and tailshield
Geragnostus
Extinct genus of trilobites
all Olenellina. H. B. Whittington; et al. (1997). "Introduction, Order Agnostida, Order Redlichiida". Treatise on Invertebrate Paleontology. Part O, Revised
Nevadia
Extinct genus of trilobites
S2CID 85698638. H.B. Whittington; et al. (1997). "Introduction, Order Agnostida, Order Redlichiida". Treatise on Invertebrate Paleontology. Part O, Revised
Peachella
Extinct genus of trilobites
Invertebrate Paleontology. Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order Redlichiida. 1997 López-Soriano, F.J.; Corbacho, J. (2012). "A
Symphysops
Extinct order of trilobites
v t e Trilobites Taxonomy Orders Agnostida Asaphida Corynexochida Harpetida Lichida Nektaspida Odontopleurida Phacopida Proetida Ptychopariida Redlichiida
Harpetida
Agnostidae is a family of Agnostida trilobites. Like all Agnostina, they were eyeless and had only two thoracic segments. These trilobites inhabited benthic
Agnostidae
Extinct genus of trilobites
Paleontology. Vol. Part O, Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order Redlichiida. p. 224. Tasch, Paul, 1951, Fauna and Paleoecology
Cedaria
Clade of arthropods
Extinct groups included in Crustaceomorpha vary considerably. It includes Agnostida (usually treated under Trilobita), Waptiida, Isoxyida, Phosphatocopida
Crustaceomorpha
Yukoniidae has an axis of three to seven rings. S. M. GON III. "Order Agnostida". Retrieved December 3, 2010. MIKKO HAARAMO (March 11, 2008). "†Yukoniidae"
Yukoniidae
Extinct species of trilobite
ptychopariid trilobite Irvingella angustilimbata. Samuel M. Gon III. "Agnostida Fact Sheet". A Guide to the Orders of Trilobites. Retrieved 18 November
Agnostotes_orientalis
Extinct species of trilobite
Animalia Phylum: Arthropoda Clade: †Artiopoda Class: †Trilobita (?) Order: †Agnostida Family: †Ptychagnostidae Genus: †Ptychagnostus Species: †P. atavus Binomial
Ptychagnostus_atavus
Extinct genus of trilobites
genus belonging to the family Weymouthiidae Kobayashi T. (1943), Order Agnostida Salter (1864) according to Whittington et al. 1997. It lived during the
Mallagnostus
Extinct family of trilobites
Doryagnostidae Pseudoperonopsis is reassigned to the Diplagnostidae Like all Agnostida, members of the Peronopsidae are diminutive, with the headshield (or cephalon)
Peronopsidae
Time interval during the Ordovician period
Trilobites of the Floian Canningella Gogoella Macrogrammus Priceaspis Thymurus Agnostida of the Floian' Galbagnostus Geragnostella Asaphida of the Floian Phthanoncoceras
Arenig
Extinct genus of trilobites
Animalia Phylum: Arthropoda Clade: †Artiopoda Class: †Trilobita (?) Order: †Agnostida Family: †Weymouthiidae Genus: †Toledodiscus Species: †T. valverdi Binomial
Toledodiscus
Scientific classification Kingdom: Animalia Phylum: Arthropoda Clade: †Artiopoda Class: †Trilobita (?) Order: †Agnostida Genus: †Xestagnostus Öpik, 1967
Xestagnostus
American paleontologist
controversially argued that the tiny planktonic trilobites belonging to the Agnostida may have had a predatory lifestyle. McMenamin's research on the Phoenician
Mark_McMenamin
Extinct genus of trilobites
Paleontology. Part O, Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order Redlichiida. Stubblefield, C.J. (1950). "XXXVIII.—Dimastocephalus
Carolinites
1915], 386–450. RUSHTON, A. W. A. 1979. A review of the Middle Cambrian Agnostida from the Abbey Shales, England. Alcheringa 3: 43-61. HOWELL B. F. 1935
Pleuroctenium
Extinct genus of trilobites
Retrieved 2008-01-12. H. B. Whittington; et al. (1997). "Introduction, Order Agnostida, Order Redlichiida". Treatise on Invertebrate Paleontology. Part O, Revised
Nevadella
Extinct order of trilobites
v t e Trilobites Taxonomy Orders Agnostida Asaphida Corynexochida Harpetida Lichida Nektaspida Odontopleurida Phacopida Proetida Ptychopariida Redlichiida
Phacopida
Paleontology Part O, Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order Redlichiida. Jell, P.A. (1975). "Australian Middle Cambrian Eodiscoids
Eodiscidae
Extinct genus of trilobites
of eodiscinid trilobite belonging to the family Weymouthiidae, order Agnostida. It lived during the Botomian stage, which lasted from approximately 524
Cobboldites
Species of trilobite (fossil)
ISBN 978-87-635-1241-1. H. B. Whittington; et al. (1997). "Introduction, Order Agnostida, Order Redlichiida". Treatise on Invertebrate Paleontology. Part O, Revised
Buenellus
Extinct genus of trilobites
Animalia Phylum: Arthropoda Clade: †Artiopoda Class: †Trilobita (?) Order: †Agnostida Family: †Peronopsidae Genus: †Pentagnostus Lermontova, 1940 Subgenera
Pentagnostus
Genus of trilobites
with a train', indicating the wide pygidial border in the rear. Like all Agnostida, Acadagnostus is diminutive, with the headshield (or cephalon) and tailshield
Acadagnostus
Extinct genus of trilobites
Animalia Phylum: Arthropoda Clade: †Artiopoda Class: †Trilobita (?) Order: †Agnostida Family: †Peronopsidae Genus: †Itagnostus Öpik, 1979 Species I. elkedrensis
Itagnostus
Extinct suborder of trilobites
Invertebrate Paleontology. Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order Redlichiida. 1997 fossilmuseum.net - various photos, some of Phacopina
Phacopina
Genus of trilobite
Animalia Phylum: Arthropoda Clade: †Artiopoda Class: †Trilobita (?) Order: †Agnostida Family: †Calodiscidae Genus: †Calodiscus Howell, 1935 Species †Calodiscus
Calodiscus
Animalia Phylum: Arthropoda Clade: †Artiopoda Class: †Trilobita (?) Order: †Agnostida Superfamily: †Condylopygoidea Genus: †Miraculaspis Romanenko, 1967
Miraculaspis
Extinct genus of trilobites
Ptychagnostus is a genus of trilobites in the order Agnostida that lived during the Cambrian period. Their remains are rarely found in empty tubes of
Ptychagnostus
Extinct genus of arthropods
Cambrian eodiscinid trilobite belonging to the family Weymouthiidae, order Agnostida. It lived during the Botomian stage = late Lower Cambrian Stage 4 (upper
Leptochilodiscus
Cambrian Russia A member of Agnostida. Aspidagnostus baoi Sp. nov Bentley & Jago Cambrian (Guzhangian) Australia A member of Agnostida. Austroxandarella Gen
2025 in arthropod paleontology
2025_in_arthropod_paleontology
Extinct genus of trilobites
v t e Trilobites Taxonomy Orders Agnostida Asaphida Corynexochida Harpetida Lichida Nektaspida Odontopleurida Phacopida Proetida Ptychopariida Redlichiida
Bumastus
Extinct subclass of trilobites
genera, and the latter being more modest in both terms of diversity. Agnostida Artiopoda Trilobita Triops Redlichiida Two primitive calymenines, (Pharostomina
Librostoma
Extinct genus of trilobites
Invertebrate Paleontology. Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order Redlichiida. 1997 Lieberman, B.S. (2002). "Phylogenetic analysis
Fallotaspidella
(1997). Part O, Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order Redlichiida. Treatise on Invertebrate Paleontology. A.Y. Rozanov;
Delgadella
Scientific classification Kingdom: Animalia Phylum: Arthropoda Clade: †Artiopoda Class: †Trilobita (?) Order: †Agnostida Genus: †Armagnostus Howell, 1937
Armagnostus
Geologic formation in France
Niobella ligneresi, Taihungshania miqueli, Ampyx priscus, Ampyxinella ; The Agnostida order is present, with: Arthrorhachis; Ptychopariida order: Euloma filacovi
Saint-Chinian_Formation
Index of articles associated with the same name
Battus is a synonym for several agnostid trilobites, now assigned to other genera. In Greek mythology, Battus is a shepherd who witnessed Hermes stealing
Battus_(trilobite)
Scientific classification Kingdom: Animalia Phylum: Arthropoda Clade: †Artiopoda Class: †Trilobita (?) Order: †Agnostida Genus: †Pseudagnostina Palmer, 1962
Pseudagnostina
Extinct order of trilobites
v t e Trilobites Taxonomy Orders Agnostida Asaphida Corynexochida Harpetida Lichida Nektaspida Odontopleurida Phacopida Proetida Ptychopariida Redlichiida
Ptychopariida
Scientific classification Kingdom: Animalia Phylum: Arthropoda Clade: †Artiopoda Class: †Trilobita (?) Order: †Agnostida Genus: †Oxyagnostus Öpik, 1967
Oxyagnostus
Extinct genus of trilobites
late Lower Ordovician (Floian) of Sweden (Billingen stage). Like all Agnostida, G. galba is diminutive and the headshield (or cephalon) and tailshield
Galbagnostus
Extinct genus of trilobites
trilobites belonging to the family Weymouthiidae Kobayashi T. (1943), Order Agnostida (Salter 1864). It lived during the late Lower Cambrian, with remains found
Tannudiscus
Extinct genus of arthropods
yushnom Kazakhstane (Kyrshabakty, Malyy Karatau) [Middle and Upper Cambrian Agnostida from the Aksai National Geological Reserve in southern Kazakhstan (Kyrshabakty
Matania
Extinct species of trilobite
v t e Trilobites Taxonomy Orders Agnostida Asaphida Corynexochida Harpetida Lichida Nektaspida Odontopleurida Phacopida Proetida Ptychopariida Redlichiida
Eldredgeops_rana
Extinct genus of trilobites
Invertebrate Paleontology. Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order Redlichiida. 1997 Öpik, A.A. (1975). "Cymbric Vale Fauna of New
Meniscuchus
Genus of trilobite
genus of artiopodan arthropod in the family Diplagnostidae of the order Agnostida. It was a widely distributed genus. The base of the Jiangshanian stage
Agnostotes
Extinct genus of trilobites
Lotagnostus is a genus of very small trilobites in the order Agnostida, which lived on the outer continental shelves worldwide, during the late Upper
Lotagnostus
Extinct order of trilobites
v t e Trilobites Taxonomy Orders Agnostida Asaphida Corynexochida Harpetida Lichida Nektaspida Odontopleurida Phacopida Proetida Ptychopariida Redlichiida
Proetida
Trilobite genus
Bolboparia, Leptochilodiscus, Serrodiscus), and Calodiscus. Like all Agnostida, Oodiscus is diminutive and the headshield (or cephalon) and tailshield
Oodiscus
Invertebrate Paleontology. Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order Redlichiida. 1997 Palmer, A.R.; Repina, L.N. (1993), "Through a
Fallotaspidoidea
Extinct family of arthropods
Invertebrate Paleontology. Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order Redlichiida. 1997 KOBAYASHI T. 1943. Brief notes on the Eodiscids
Weymouthiidae
Canadian botanist and geologist (1837–1923)
v t e Trilobites Taxonomy Orders Agnostida Asaphida Corynexochida Harpetida Lichida Nektaspida Odontopleurida Phacopida Proetida Ptychopariida Redlichiida
George_Frederick_Matthew
Genus of trilobites
Obelagnostus is a genus of trilobites in the order Agnostida, which existed in what is now Antarctica. It was described by Shergold and Webers in 1992
Obelagnostus
Genus of trilobites
1915], 386 – 450. RUSHTON, A. W. A. 1979. A review of the Middle Cambrian Agnostida from the Abbey Shales, England. Alcheringa 3: 43-61. RUSHTON, A. W. A
Bailiaspis
Animalia Phylum: Arthropoda Clade: †Artiopoda Class: †Trilobita (?) Order: †Agnostida Suborder: †Agnostina Superfamily: †Agnostoidea Family: †Ammagnostidae
Ammagnostidae
Extinct genus of trilobites
Animalia Phylum: Arthropoda Clade: †Artiopoda Class: †Trilobita (?) Order: †Agnostida Family: †Peronopsidae Genus: †Archaeagnostus Kobayashi, 1939 Species A
Archaeagnostus
Extinct genus of trilobites
on 2012-05-26. H. B. Whittington; et al. (1997). "Introduction, Order Agnostida, Order Redlichiida". Treatise on Invertebrate Paleontology. Part O, Revised
Mesolenellus
Extinct genus of trilobites
are now the eastern United States, England, Siberia and China. Like all Agnostida, Weymouthia is diminutive and the headshield (or cephalon) and tailshield
Weymouthia_(trilobite)
Extinct genus of trilobites
B. et al. Part O, Treatise on Invertebrate Paleontology. Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order Redlichiida. 1997 v t e
Eoagnostus
al. Part O, Treatise on Invertebrate Paleontology. Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order Redlichiida. 1997 v t e v t e
Bathydiscus
Extinct genus of trilobites
Innitagnostus is a genus of trilobites in the order Agnostida, which existed in what is now Queensland, Australia. It was described by Öpik, 1967, and
Innitagnostus
Extinct genus of trilobites
trilobite belonging to the family Weymouthiidae Kobayashi T. (1943), Order Agnostida Salter (1864). It lived during the Botomian stage = late Lower Cambrian
Acidiscus
Index of articles associated with the same name
Invertebrate Paleontology. Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order Redlichiida. 1997 Ramskjöld, L.; Werdelin, L. (1991). "The phylogeny
Trilobites_(genus)
Extinct genus of trilobites
trilobites belonging to the family Weymouthiidae Kobayashi T. (1943), Order Agnostida (Salter 1864) It lived during the Botomian stage. It can easily be distinguished
Analox
Dresbachian Scientific classification Kingdom: Animalia Phylum: Arthropoda Clade: †Artiopoda Class: †Trilobita (?) Order: †Agnostida Genus: †Pleurinodus
Pleurinodus
Extinct genus of trilobites
pp. 1-35.[1] H. B. Whittington; et al. (1997). "Introduction, Order Agnostida, Order Redlichiida". Treatise on Invertebrate Paleontology. Part O, Revised
Mesonacis
AGNOSTIDA
AGNOSTIDA
AGNOSTIDA
AGNOSTIDA
Boy/Male
Tamil
Leading
Girl/Female
American, Australian, British, English
Strong and Womanly; Blend of Deanne and Variants of Andrea and Sandra; Protector of Man
Male
English
Short form of English Nicholas/Nickolas, NICK means "victor of the people."
Girl/Female
Australian, British, Christian, English, French
Battle
Boy/Male
African, Bengali, Gujarati, Hindu, Indian, Malayalam, Marathi, Swahili, Telugu, Traditional
Moon
Girl/Female
Australian, Chinese
Wonderful; Excellent; Clever; Subtle
Girl/Female
Hindu, Indian
Cold Vision
Boy/Male
Hindu, Indian, Marathi
The Sun
Boy/Male
Teutonic German
Peaceful ruler.
Boy/Male
Arabic
Happening; Event
AGNOSTIDA
AGNOSTIDA
AGNOSTIDA
AGNOSTIDA
AGNOSTIDA